Filter-basin for brewing purposes.



v STOCKHEIM. FILTER BASIN FOR BREWING PURPOSES.

APPLICATION FILED MAY 22, 1909.

953,495., Patented 29, Jim.

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I HEINRICH STOCKHEIM, OF MANNHEIM. GERMANY.

FILTER-BASIN FOR BREW'ING PURPOSES.

To all whom it may concern:

Be it'known that I, HEINRICH STOCK- m, a subject of the Grand Duke of 'Baden, Germany, residing in Mannheim,

Baden, Germany, have invented an Improvement in Filter-Basins for Brewing Purposes, of which the following is a specification.

Heretofore so far as I amaware, filters .used for brewing purposes have commonly comprised a plurality of superimposed sep arate filter basins, each of which has comprised a frame or body member with a sieve or rate bottom, which latter is commonly ma e of metal coated with a surface of tin to preventthe formation of verdigris. It has been found that this coating of tin tends to cause a so-called metallic turbidity of the beer, or in other. words, there is an acid'reaction tending to give the beer a metallic taste and also to produce more or less of a sediment therein, and for this reason the sieve or grate bottoms of the filter basins have "also been given a coat of varnish, which as will bennderstood, was shortlived due to the fact that these,filter basins are frequently cleaned by means of mordant lyes, hot water and stiff brushes. More recently these filter basins have been constructed entirely of such a material as would render them free from the objection of causin any metallic turbidity, in the beer, and this material has commonly been hard rubber. Filter basins constructed of this material have served theirpurpose, but from the fact that they are necessarily brittle,

they exert little or no resistance to the hard" use to which they are subjected and consequently they frequently break to pieces.

Now the-object of my present invention is to overcome the hereinbefore' named difliculties, and incarrying out the same I pro-- vide a filter; basinin which the frame or body member is made of metal, a grate or sieve bottom therefor which is so constructed as to have 'asurface of hard rubber, and

or body means whereby the said sieve or grate bottom is secured in position within the frame member of the filter basin.

- In the drawing, Figure 1 is a partial cross section of a filter basin illustrating my resent invention, Fig. 2'is a plan view 0 the same on a reduced scale, and Fig. 3 is a cross section illustrating a modified form of my invention.

Specification of Letters Patent.

- Iatented Mar. 29, 1910.

Application filed May 22, 1909. Serial No. 497.794.

Referring particularly to the drawing, my mproved filter basin preferably comprises a. frame or body member a which as illustrated is circular in configuration butwhich as will be understood, may be of any other form. This frame member a is provided with end flanges 6 (Z respectively; the end flange d being provided with a recess 6;

The numeral 1 represents a sieve or grate bottom which is preferably made of caoutchouc or hard rubber, or may be made with a metallic frame covered with a substantial coating of hard rubber' so that the surface which comes into contact with the beer will be made of this material; the sieve being provided with a series of slots or apertures.

3 designates a ring adapted to fit within the recess e in the 'fiange d. This ring 3 is also preferably recessed so as to receive the periphery of the sieve or grate member 1 which as plainly illustrated in Fig. 1, fits between the ring 3 and the inner surface of the recess 6; the ring 3 being of-a thickness corresponding with the depth of the recess 6 so that the lower surface of the same when the parts are together, comes approximately flush with the under surface 2 of the flange cl;

The flange b is provided with a groove 0 in which as illustrated in Fig. l, a gasket 4 is fitted, upon which as will also be understood, the next adjacent superimposed filter basin of the filter is placed and supported.

It will be seen that by the use ofthe hereinbefore described filter basin, the grate or sieve bottoms being made of hard rubber or of other material coated with hard rubber as have become worn or otherwise defective,

and in so doing it is not necessary to replace the entire filter basin as has heretofore been the case.

I claim as my invention:

1. A filter basin comprising a metallic body member, a separable grate bottom therefor whose surface is of hard rubber, and means for securing the said grate bottom within said body thereof.

2. 'A filter basin for brewing purposes, comprising a circular body member, bottom whose surfacecis of hard rubber,

a grate ndv no a ring fitting within the said body member" fla ge of the bo iy member, the said rinrgl and provided with a recess for recelvlng being slso provided with a recess sdapte said grate bottom. to reoelve the periphery of the sand grate 3. A fi1ter b asin for brewing purposes bottom. I I

5 COIIIPIlSlIlg a clrcular metalhc gody mem- Slgned by me this 7th day of May, 1909. 1 5 her flzuwes at the extremities 0 the same- TT one of 53101 flanges being provided with 5 }I?E%1\RICH STOCKHEIM' recess, a hard rubber grate bottom for said Witnesses: body member and a ring adapted to be re- N K. SHANE,

10 oeived within the said recess in the said; P. PIROHHART, 

